Effect of water on yield of celery cultivation techniques for high yield of celery

Celery has shallow roots and weak root absorptive capacity. Its root groups are mainly distributed in the soil layer of underground 10--20cm, and the horizontal distribution is about 30cm. Therefore, in the peak growth period of celery, whether enough water can be provided in time will directly affect the yield and quality of celery.

Celery

Celery likes the cold, cool and humid environment, the suitable temperature for growth is 15 ℃-20 ℃, the high temperature is above 30 ℃, but it can still grow, but it does not grow well and the quality is poor, but it can endure high temperature at seedling stage. 4 the young plants of celery with 5 leaves can endure the low temperature of-10 ℃ and 12 ℃, and the adults can endure the low temperature of 10 ℃ for a short time. Celery is a green vernalization plant with 4 leaves of 3mur. at a low temperature of 2 ℃-5 ℃, 15murine can pass the vernalization stage in 20 days. After passing through the vernalization stage, celery produces flowering stems, blossoms and bears fruit under long sunshine and high temperature. Celery requires moderate light intensity, and strong light inhibits longitudinal growth and promotes lateral growth. Under the strong light, the fiber degree of petiole was high and the quality decreased.

The growth of celery seedlings is slow, the seedling stage is longer, and the root absorption capacity is weak, so the requirement of water is strict. After entering the slow growth period, celery needs less water than seedlings. When celery enters the vigorous growth period, the surface is covered with white fibrous roots, which requires the most water.

The mineral requirements of celery are mainly nitrogen and phosphorus in the early growth stage and nitrogen and potassium in the later growth stage. Celery has a large demand for boron and calcium, the petiole is easy to crack when boron is deficient, and black heart disease is easy to occur when calcium is deficient. Celery can be cultivated in four seasons. However, it is generally necessary to cultivate strong seedlings before cultivation, with a seed consumption of 30muri 50g per mu.

Raise seedlings. If the seedlings are raised at low temperature, it is generally necessary to soak the seeds to promote germination, soak the seeds in clear water for 24 hours, and the germination temperature is 15 ℃. After sowing, the seedlings are covered with 1cm fine sand or 0.5cm fine wet soil, and the back cover is moisturized and insulated, requiring a soil temperature of 15 ℃-20 ℃. Such as sowing at high temperature, generally dry seed direct seeding seedlings, immediately after sowing with thin grass curtains and other mulch shade, after emergence to gradually reduce shading. After emergence, the water absorption of seedlings is poor, and the seedlings should be watered frequently with small water. After that, the seedlings are dry and wet on the border surface, and are planted when they reach 3 leaves and 1 heart or 4 leaves and 1 heart.

Colonization. The planting density depends on the size of celery variety itself and the demand for commodity size. Generally, the plant-row spacing should be 25Mel 35cm if the weight of a single plant is 700Mel 1000g; the plant-row spacing should be 13--17cm if the weight of a single plant is 300Mel 600g; the plant-row spacing of a single plant should be 17mur25cm.

Management after planting. The temperature is generally 15 ℃-20 ℃ in the daytime and 5 ℃-10 ℃ in the night. Try to keep the night temperature not lower than 5 ℃. The height of celery seedlings is about 15cm. When they start to close the ridges, they begin to fertilize and water them, using 15Mul 20kg ammonium nitrate per mu or 25Mul 30kg ammonium sulfate each time, and then watering them once every 5 days, and 15Mui topdressing one fertilizer for 20 days. 50Murray can be harvested in 60 days.